Update GitLab plugin to 1.7.0 (#24394)

server/Makefile

@@ -166,7 +166,7 @@ PLUGIN_PACKAGES += mattermost-plugin-channel-export-v1.0.0
 PLUGIN_PACKAGES += mattermost-plugin-confluence-v1.3.0
 PLUGIN_PACKAGES += mattermost-plugin-custom-attributes-v1.3.1
 PLUGIN_PACKAGES += mattermost-plugin-github-v2.1.6
-PLUGIN_PACKAGES += mattermost-plugin-gitlab-v1.6.0
+PLUGIN_PACKAGES += mattermost-plugin-gitlab-v1.7.0
 PLUGIN_PACKAGES += mattermost-plugin-playbooks-v1.38.1
 PLUGIN_PACKAGES += mattermost-plugin-jenkins-v1.1.0
 PLUGIN_PACKAGES += mattermost-plugin-jira-v3.2.5